Chapter Wise Test — AI-Powered Exam Practice
Empowering Students with AI-Powered Assessments & Intelligent Learning
☎ +91 99410 52464
✉ admin@chaptertest.in
Comparative Exams · NEET · 2017

NEET 2017 CODE D

180 questions from this NEET 2017 paper. Log in to view the correct answer and explanation for each question.

All years / 2017
Q4 PHYSICS Unit 6: Gravitation
Two astronauts are floating in gravitational free space after having lost contact with their spaceship. The two will:
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Move away from each other
  • B. Will become stationary
  • C. Keep floating at the same distance between them
  • D. Move towards each other

Correct answer & explanation hidden

Log in to view solution →
Q5 PHYSICS Unit 9: Kinetic Theory of Gases
The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T kelvin and mass m is:
↻ Repeated question — also appeared in 2017 (1 set)
  • A. h / \sqrt{3mkT}
  • B. 2h / \sqrt{mkT}
  • C. h / \sqrt{mkT}
  • D. h / \sqrt{3mkT}

Correct answer & explanation hidden

Log in to view solution →
Q6 PHYSICS Unit 11: Electrostatics
A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of the resulting system:
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Remains the same
  • B. Increases by a factor of 2
  • C. Increases by a factor of 4
  • D. Decreases by a factor of 2

Correct answer & explanation hidden

Log in to view solution →
Q7 PHYSICS Unit 19: Electronic Devices
Which one of the following represents forward bias diode?
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. +2 V and −2 V with R
  • B. 5 V and 3 V with R
  • C. −2 V and 0 V with R
  • D. −3 V and −4 V with R

Correct answer & explanation hidden

Log in to view solution →
Q8 PHYSICS Unit 17: Dual Nature of Matter and Radiation
The photoelectric threshold wavelength of silver is 3250 × 10^-10 m. The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength 2536 × 10^-10 m is given that h = 4.14 × 10^-15 eV s and c = 3 × 10^8 m s^-1.
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. ≈ 6.1 × 10^4 m s^-1
  • B. ≈ 0.3 × 10^6 m s^-1
  • C. ≈ 6 × 10^5 m s^-1
  • D. ≈ 0.6 × 10^6 m s^-1

Correct answer & explanation hidden

Log in to view solution →
Q9 PHYSICS Unit 10: Oscillations and Waves
Two cars moving in opposite directions approach each other with speed of 22 m/s and 16.5 m/s respectively. The driver of the first car blows a horn having a frequency 400 Hz. The frequency heard by the driver of the second car is [velocity of sound = 340 m/s]:
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. 411 Hz
  • B. 448 Hz
  • C. 350 Hz
  • D. 361 Hz

Correct answer & explanation hidden

Log in to view solution →
Q10 PHYSICS Unit 12: Current Electricity
A circuit contains three identical resistors of resistance R = 9.0 Ω each, two identical inductors of inductance L = 2.0 mH each, and an ideal battery of emf ε = 18 V. The current i through the battery just after the switch is closed is:
  • A. 2 A
  • B. 0 ampere
  • C. 2 mA
  • D. 0.2 A

Correct answer & explanation hidden

Log in to view solution →
Q11 PHYSICS Unit 16: Optics
A beam of light from a source L is incident normally on a plane mirror fixed at a certain distance x from the source. The beam is reflected back as a spot on a scale placed just above the source L. When the mirror is rotated through a small angle θ, the spot of the light is found to move through a distance y on the scale. The angle θ is given by:
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. x / y
  • B. y / x
  • C. y / 2x
  • D. 2y / x

Correct answer & explanation hidden

Log in to view solution →
Q12 PHYSICS Unit 13: Magnetic Effects of Current and Magnetism
An arrangement of three parallel straight wires placed perpendicular to the plane of paper carrying the same current I along the same direction is shown in the figure. The magnitude of force per unit length on the middle wire B is given by:
↻ Repeated question — also appeared in 2017 (1 set)
  • A. \u03bc0 I^2 / (2\u03c0d)
  • B. \u03bc0 I^2 / d
  • C. \u03bc0 I^2 / (2d)
  • D. \u03bc0 I^2 / (4\u03c0d)

Correct answer & explanation hidden

Log in to view solution →
Q13 PHYSICS Unit 16: Optics
Young’s double slit experiment is first performed in air and then in a medium other than air. It is found that the 8th bright fringe in the medium lies where the 5th dark fringe lies in air. The refractive index of the medium is nearly:
  • A. 1.69
  • B. 1.78
  • C. 1.25
  • D. 1.59

Correct answer & explanation hidden

Log in to view solution →
Q13 PHYSICS Unit 16: Optics
Young's double slit experiment is first performed in air and then in a medium other than air. It is found that the 8th bright fringe in the medium lies where the 5th dark fringe lies in air. The refractive index of the medium is nearly
  • A. 1.69
  • B. 1.78
  • C. 1.25
  • D. 1.59

Correct answer & explanation hidden

Log in to view solution →
Q14 PHYSICS Unit 5: Rotational Motion
A spring of force constant k is cut into lengths in the ratio 1 : 2 : 3. They are connected in series and the new force constant is k'. Then they are connected in parallel and force constant is k''. Then k' : k'' is:
  • A. 1 : 11
  • B. 1 : 14
  • C. 1 : 6
  • D. 1 : 9

Correct answer & explanation hidden

Log in to view solution →
Q14 PHYSICS Unit 4: Work Energy and Power
A spring of force constant k is cut into lengths in the ratio 1 : 2 : 3. They are connected in series and the new force constant is k'. Then they are connected in parallel and force constant is k''. Then k' : k'' is
  • A. 1 : 11
  • B. 1 : 14
  • C. 1 : 6
  • D. 1 : 9

Correct answer & explanation hidden

Log in to view solution →
Q15 PHYSICS Unit 16: Optics
A thin prism having refracting angle 10° is made of glass of refractive index 1.42. This prism is combined with another thin prism of glass of refractive index 1.7. This combination produces dispersion without deviation. The refracting angle of the second prism should be
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. 8°
  • B. 10°
  • C. 4°
  • D. 6°

Correct answer & explanation hidden

Log in to view solution →
Q16 PHYSICS Unit 8: Thermodynamics
A gas mixture consists of 2 moles of O2 and 4 moles of Ar at temperature T. Neglecting all vibrational modes, the total internal energy of the system is
↻ Repeated question — also appeared in 2017 (1 set)
  • A. 9RT
  • B. 11RT
  • C. 4RT
  • D. 15RT

Correct answer & explanation hidden

Log in to view solution →
Q17 PHYSICS Unit 4: Work Energy and Power
A drop of rain water having mass 1 g falls from a height of 1 km. It hits the ground with a speed of 50 m/s. Take g constant and equal to 10 m/s^2. The work done by (i) the gravitational force and (ii) the resistive force of air is
↻ Repeated question — also appeared in 2017 (1 set)
  • A. (i) 100 J, (ii) 8.75 J
  • B. (i) 10 J, (ii) −8.75 J
  • C. (i) −10 J, (ii) −8.25 J
  • D. (i) 1.25 J, (ii) −8.25 J

Correct answer & explanation hidden

Log in to view solution →
Q18 PHYSICS Unit 2: Kinematics
The x and y coordinates of a particle at any time are x = 5t − 2t^2 and y = 10t, where x and y are in metres and t in seconds. The acceleration of the particle at t = 2 s is
  • A. −4 m/s^2
  • B. −8 m/s^2
  • D. 5 m/s^2

Correct answer & explanation hidden

Log in to view solution →
Q19 PHYSICS Unit 5: Rotational Motion
Two discs of the same moment of inertia rotating about their regular axis passing through the centre and perpendicular to the plane of the disc with angular velocities ω1 and ω2 are brought into contact face to face coinciding the axis of rotation. The expression for loss of energy during this process is
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. I(ω1 − ω2)^2
  • B. I(ω1 − ω2)^2 / 8
  • C. I(ω1 + ω2)^2 / 2
  • D. I(ω1 − ω2)^2 / 4

Correct answer & explanation hidden

Log in to view solution →
Q20 PHYSICS Unit 8: Thermodynamics
Thermodynamic processes are indicated in the following diagram. Match the following: Column-1: P. Process I, Q. Process II, R. Process III, S. Process IV Column-2: a. Adiabatic, b. Isobaric, c. Isochoric, d. Isothermal
↻ Repeated question — also appeared in 2017 (1 set)
  • A. P → c, Q → d, R → b, S → a
  • B. P → d, Q → b, R → a, S → c
  • C. P → a, Q → c, R → d, S → b
  • D. P → c, Q → a, R → d, S → b

Correct answer & explanation hidden

Log in to view solution →
Q21 PHYSICS Unit 7: Properties of Solids and Liquids
The bulk modulus of a spherical object is B. If it is subjected to uniform pressure p, the fractional decrease in radius is
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. 3p/B
  • B. p/3B
  • C. p/B
  • D. 3B/p

Correct answer & explanation hidden

Log in to view solution →
Q21 PHYSICS Unit 7: Properties of Solids and Liquids
The bulk modulus of a spherical object is B. If it is subjected to uniform pressure p, the fractional decrease in radius is
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. 3p/B
  • B. p/(3B)
  • C. p/B
  • D. 3B/p

Correct answer & explanation hidden

Log in to view solution →
Q22 PHYSICS Unit 6: Gravitation
The acceleration due to gravity at a height 1 km above the earth is the same as at a depth d below the surface of the earth. Then
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. d = 3 km / 2
  • B. d = 2 km
  • C. d = 1 km / 2
  • D. d = 1 km

Correct answer & explanation hidden

Log in to view solution →
Q22 PHYSICS Unit 6: Gravitation
The acceleration due to gravity at a height 1 km above the earth is the same as at a depth d below the surface of earth. Then
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. d = 3 km/2
  • B. d = 2 km
  • C. d = 1 km/2
  • D. d = 1 km

Correct answer & explanation hidden

Log in to view solution →
Q23 PHYSICS Unit 11: Electrostatics
The diagrams below show regions of equipotentials. A positive charge is moved from A to B in each diagram. Which of the following is correct?
  • A. Minimum work is required to move q in figure (a).
  • B. Maximum work is required to move q in figure (b).
  • C. Maximum work is required to move q in figure (c).
  • D. In all the four cases the work done is the same.

Correct answer & explanation hidden

Log in to view solution →
Q23 PHYSICS Unit 11: Electrostatics
The diagrams below show regions of equipotentials. A positive charge is moved from A to B in each diagram. Which of the following is correct?
  • A. Minimum work is required to move q in figure (a).
  • B. Maximum work is required to move q in figure (b).
  • C. Maximum work is required to move q in figure (c).
  • D. In all the four cases the work done is the same.

Correct answer & explanation hidden

Log in to view solution →
Q24 PHYSICS Unit 2: Kinematics
Preeti reached the metro station and found that the escalator was not working. She walked up the stationary escalator in time t1. On other days, if she remains stationary on the moving escalator, then the escalator takes her up in time t2. The time taken by her to walk up on the moving escalator will be
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. t1t2/(t1 + t2)
  • B. t1 - t2
  • C. t1 + t2/2
  • D. (t1 - t2)/(t1t2)

Correct answer & explanation hidden

Log in to view solution →
Q25 PHYSICS Unit 3: Laws of Motion
Two blocks A and B of masses 3m and m respectively are connected by a massless and inextensible string. The whole system is suspended by a massless spring as shown in figure. The magnitudes of acceleration of A and B immediately after the string is cut, are respectively
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. g, g
  • B. g/3, g/3
  • C. g, g/3
  • D. g/3, g

Correct answer & explanation hidden

Log in to view solution →
Q26 BIOLOGY Unit 8: Biology and Human Welfare
A spherical black body with a radius of 12 cm radiates 450 watt power at 500 K. If the radius were halved and the temperature doubled, the power radiated in watt would be
  • A. 1000
  • B. 1800
  • C. 225
  • D. 450

Correct answer & explanation hidden

Log in to view solution →
Q27 PHYSICS Unit 7: Properties of Solids and Liquids
Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K1 and K2. The thermal conductivity of the composite rod will be
  • A. K1 + K2
  • B. 2(K1 + K2)
  • C. 2K1K2/(K1 + K2)
  • D. (3/2)(K1 + K2)

Correct answer & explanation hidden

Log in to view solution →
Q28 PHYSICS Unit 5: Rotational Motion
One end of a string of length l is connected to a particle of mass m and the other end is connected to a small peg on a smooth horizontal table. If the particle moves in a circle with speed v, the net force on the particle directed towards the center will be (T represents the tension in the string)
↻ Repeated question — also appeared in 2017 (1 set)
  • A. mv^2/l - T
  • B. Zero
  • C. T
  • D. mv^2/l + T

Correct answer & explanation hidden

Log in to view solution →
Q29 PHYSICS Unit 19: Electronic Devices
In a common emitter transistor amplifier the audio signal voltage across the collector is 3 V. The resistance of collector is 3 kΩ. If current gain is 100 and the base resistance is 2 kΩ, the voltage and power gain of the amplifier is
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. 150 and 15000
  • B. 20 and 2000
  • C. 200 and 1000
  • D. 15 and 200

Correct answer & explanation hidden

Log in to view solution →
Q30 PHYSICS Unit 3: Laws of Motion
Which of the following statements are correct? (a) Centre of mass of a body always coincides with the centre of gravity of the body. (b) Centre of mass of a body is the point at which the total gravitational torque on the body is zero. (c) A couple on a body produce both translational and rotational motion in a body. (d) Mechanical advantage greater than one means that small effort can be used to lift a large load.
  • A. (b) and (c)
  • B. (c) and (d)
  • C. (b) and (d)
  • D. (a) and (b)

Correct answer & explanation hidden

Log in to view solution →
Q30 PHYSICS Unit 5: Rotational Motion
Which of the following statements are correct? (a) Centre of mass of a body always coincides with the centre of gravity of the body. (b) Centre of mass of a body is the point at which the total gravitational torque on the body is zero. (c) A couple on a body produces both translational and rotational motion in a body. (d) Mechanical advantage greater than one means that small effort can be used to lift a large load.
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. (b) and (c)
  • B. (c) and (d)
  • C. (b) and (d)
  • D. (a) and (b)

Correct answer & explanation hidden

Log in to view solution →
Q31 PHYSICS Unit 5: Rotational Motion
A rope is wound around a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force of 30 N?
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. 25 rad/s^2
  • B. 5 m/s^2
  • C. 25 m/s^2
  • D. 0.25 rad/s^2

Correct answer & explanation hidden

Log in to view solution →
Q31 PHYSICS Unit 5: Rotational Motion
A rope is wound around a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force of 30 N?
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. 25 rad/s²
  • B. 5 m/s²
  • C. 25 m/s²
  • D. 0.25 rad/s²

Correct answer & explanation hidden

Log in to view solution →
Q32 PHYSICS Unit 14: Electromagnetic Induction and Alternating Currents
A long solenoid of diameter 0.1 m has 2 × 10^4 turns per meter. At the centre of the solenoid, a coil of 100 turns and radius 0.01 m is placed with its axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to 0 A from 4 A in 0.05 s. If the resistance of the coil is 10π^2 Ω, the total charge flowing through the coil during this time is
↻ Repeated question — also appeared in 2017 (1 set)
  • A. 32 μC
  • B. 16π μC
  • C. 32π μC
  • D. 16 μC

Correct answer & explanation hidden

Log in to view solution →
Q33 PHYSICS Unit 18: Atoms and Nuclei
The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is
  • A. 4
  • B. 0.5
  • C. 2
  • D. 1

Correct answer & explanation hidden

Log in to view solution →
Q34 PHYSICS Unit 6: Gravitation
Suppose the charge of a proton and an electron differ slightly. One of them is −e, the other is (e + Δe). If the net electrostatic force and gravitational force between two hydrogen atoms placed at a distance d (much greater than atomic size) apart is zero, then Δe is of the order of [Given mass of hydrogen mh = 1.67 × 10^−27 kg]
  • A. 10^−37 C
  • B. 10^−47 C
  • C. 10^−20 C
  • D. 10^−23 C

Correct answer & explanation hidden

Log in to view solution →
Q35 PHYSICS Unit 19: Electronic Devices
The given electrical network is equivalent to
↻ Repeated question — also appeared in 2017 (1 set)
  • A. NOR gate
  • B. NOT gate
  • C. AND gate
  • D. OR gate

Correct answer & explanation hidden

Log in to view solution →
Q36 PHYSICS Unit 8: Thermodynamics
A Carnot engine having an efficiency of 1/10 as a heat engine is used as a refrigerator. If the work done on the system is 10 J, the amount of energy absorbed from the reservoir at lower temperature is
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. 99 J
  • B. 100 J
  • C. 1 J
  • D. 90 J

Correct answer & explanation hidden

Log in to view solution →
Q37 PHYSICS Unit 15: Electromagnetic Waves
In an electromagnetic wave in free space the root mean square value of the electric field is E_rms = 6 V/m. The peak value of the magnetic field is
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. 0.70 × 10^−8 T
  • B. 4.23 × 10^−8 T
  • C. 1.41 × 10^−8 T
  • D. 2.83 × 10^−8 T

Correct answer & explanation hidden

Log in to view solution →
Q38 PHYSICS Unit 16: Optics
Two Polaroids P1 and P2 are placed with their axes perpendicular to each other. Unpolarised light I0 is incident on P1. A third polaroid P3 is kept in between P1 and P2 such that its axis makes an angle 45° with that of P1. The intensity of transmitted light through P2 is
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. I0/8
  • B. I0/16
  • C. I0/2
  • D. I0/4

Correct answer & explanation hidden

Log in to view solution →
Q39 PHYSICS Unit 13: Magnetic Effects of Current and Magnetism
If θ1 and θ2 be the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of dip θ is given by
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. cot²θ = cot²θ1 − cot²θ2
  • B. tan²θ = tan²θ1 − tan²θ2
  • C. cot²θ = cot²θ1 + cot²θ2
  • D. tan²θ = tan²θ1 + tan²θ2

Correct answer & explanation hidden

Log in to view solution →
Q39 PHYSICS Unit 13: Magnetic Effects of Current and Magnetism
If θ1 and θ2 be the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of dip θ is given by
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. cot²θ = cot²θ1 − cot²θ2
  • B. tan²θ = tan²θ1 − tan²θ2
  • C. cot²θ = cot²θ1 + cot²θ2
  • D. tan²θ = tan²θ1 + tan²θ2

Correct answer & explanation hidden

Log in to view solution →
Q40 PHYSICS Unit 13: Magnetic Effects of Current and Magnetism
A 250-turn rectangular coil of length 2.1 cm and width 1.25 cm carries a current of 85 μA and is subjected to a magnetic field of strength 0.85 T. Work done for rotating the coil by 180° against the torque is
  • A. 2.3 μJ
  • B. 1.15 μJ
  • C. 9.1 μJ
  • D. 4.55 μJ

Correct answer & explanation hidden

Log in to view solution →
Q40 PHYSICS Unit 13: Magnetic Effects of Current and Magnetism
A 250-turn rectangular coil of length 2.1 cm and width 1.25 cm carries a current of 85 μA and is subjected to a magnetic field of strength 0.85 T. The work done in rotating the coil by 180° against the torque is
  • A. 2.3 μJ
  • B. 1.15 μJ
  • C. 9.1 μJ
  • D. 4.55 μJ

Correct answer & explanation hidden

Log in to view solution →
Q41 PHYSICS Unit 7: Properties of Solids and Liquids
The resistance of a wire is R ohm. If it is melted and stretched to n times its original length, its new resistance will be
  • A. n²R
  • B. R/n²
  • C. nR
  • D. R/n

Correct answer & explanation hidden

Log in to view solution →
Q41 PHYSICS Unit 1: Physics and Measurement
The resistance of a wire is R ohm. If it is melted and stretched to n times its original length, its new resistance will be
  • A. n²R
  • B. 2R/n
  • C. nR
  • D. R/n

Correct answer & explanation hidden

Log in to view solution →
Q42 PHYSICS Unit 1: Physics and Measurement
A physical quantity of the dimensions of length that can be formed out of c, G and 1/(4πϵ0)e² is [c is velocity of light, G is universal gravitational constant and e is charge]
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. [(1/4πϵ0)e²/Gc]^(1/2)
  • B. (1/4πϵ0)e²/Gc
  • C. [(1/4πϵ0)e²/(Gc)]^(1/2)
  • D. [(1/4πϵ0)e²/(cG)]^(1/2)

Correct answer & explanation hidden

Log in to view solution →
Q43 PHYSICS Unit 18: Atoms and Nuclei
Radioactive material A has decay constant 8λ and material B has decay constant λ. Initially they have the same number of nuclei. After what time will the ratio of the number of nuclei of material B to that of A be 1/e?
  • A. 1/(8λ)
  • B. 1/(9λ)
  • C. 1/λ
  • D. 1/(7λ)

Correct answer & explanation hidden

Log in to view solution →
Q44 PHYSICS Unit 12: Current Electricity
A potentiometer is an accurate and versatile device to make electrical measurements of emf because the method involves:
  • A. a condition of no current flow through the galvanometer
  • B. a combination of cells, galvanometer and resistances
  • C. cells
  • D. potential gradients

Correct answer & explanation hidden

Log in to view solution →
Q45 PHYSICS Unit 16: Optics
The ratio of resolving powers of an optical microscope for two wavelengths λ1 = 4000 Å and λ2 = 6000 Å is
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. 3 : 2
  • B. 16 : 81
  • C. 8 : 27
  • D. 9 : 4

Correct answer & explanation hidden

Log in to view solution →
Q46 BIOLOGY Unit 7: Genetics and Evolution
A disease caused by an autosomal primary non-disjunction is
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Turner's syndrome
  • B. Sickle cell anemia
  • C. Down's syndrome
  • D. Klinefelter's syndrome

Correct answer & explanation hidden

Log in to view solution →
Q47 BIOLOGY Unit 6: Reproduction
A dioecious flowering plant prevents both:
↻ Repeated question — also appeared in 2017 (1 set)
  • A. geitonogamy and xenogamy
  • B. cleistogamy and xenogamy
  • C. autogamy and xenogamy
  • D. autogamy and geitonogamy

Correct answer & explanation hidden

Log in to view solution →
Q48 BIOLOGY Unit 6: Reproduction
Attractants and rewards are required for
↻ Repeated question — also appeared in 2017 (1 set)
  • A. Hydrophily
  • B. Cleistogamy
  • C. Anemophily
  • D. Entomophily

Correct answer & explanation hidden

Log in to view solution →
Q49 BIOLOGY Unit 10: Ecology and Environment
Alexander von Humboldt described for the first time
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Species-area relationships
  • B. Population growth equation
  • C. Ecological biodiversity
  • D. Laws of limiting factor

Correct answer & explanation hidden

Log in to view solution →
Q50 BIOLOGY Unit 3: Cell Structure and Function
Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. Chloroplast
  • B. Mitochondrion
  • C. Lysosome
  • D. Ribosome

Correct answer & explanation hidden

Log in to view solution →
Q50 BIOLOGY Unit 3: Cell Structure and Function
Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. Chloroplast
  • B. Mitochondrion
  • C. Lysosome
  • D. Ribosome

Correct answer & explanation hidden

Log in to view solution →
Q51 BIOLOGY Unit 6: Reproduction
Zygotic meiosis is characteristic of
↻ Repeated question — also appeared in 2017 (1 set)
  • A. Funaria
  • B. Chlamydomonas
  • C. Marchantia
  • D. Fucus

Correct answer & explanation hidden

Log in to view solution →
Q52 BIOLOGY Unit 5: Human Physiology
Good vision depends on adequate intake of carotene-rich food. Select the best option from the following statements: (a) Vitamin A derivatives are formed from carotene (b) The photopigments are embedded in the membrane discs of the inner segment (c) Retinal is a derivative of vitamin A (d) Retinal is a light-absorbing part of all the visual photopigments
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. (a) and (c)
  • B. (b), (c) and (d)
  • C. (a) and (b)
  • D. (a), (c) and (d)

Correct answer & explanation hidden

Log in to view solution →
Q52 BIOLOGY Unit 5: Human Physiology
Good vision depends on adequate intake of carotene-rich food. Select the best option from the following statements: (a) Vitamin A derivatives are formed from carotene. (b) The photopigments are embedded in the membrane discs of the inner segment. (c) Retinal is a derivative of vitamin A. (d) Retinal is a light-absorbing part of all the visual photopigments.
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. (a) and (c)
  • B. (b), (c) and (d)
  • C. (a) and (b)
  • D. (a), (c) and (d)

Correct answer & explanation hidden

Log in to view solution →
Q53 BIOLOGY Unit 7: Genetics and Evolution
Among the following characters, which one was not considered by Mendel in his experiments on pea?
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Seed – Green or Yellow
  • B. Pod – Inflated or Constricted
  • C. Stem – Tall or Dwarf
  • D. Trichomes – Glandular or non-glandular

Correct answer & explanation hidden

Log in to view solution →
Q54 BIOLOGY Unit 7: Genetics and Evolution
The association of histone H1 with a nucleosome indicates:
  • A. The DNA is condensed into a chromatin fibre
  • B. The DNA double helix is exposed
  • C. Transcription is occurring
  • D. DNA replication is occurring

Correct answer & explanation hidden

Log in to view solution →
Q55 BIOLOGY Unit 2: Structural Organisation in Animals and Plants
The pivot joint between atlas and axis is a type of
  • A. Synovial joint
  • B. Saddle joint
  • C. Fibrous joint
  • D. Cartilaginous joint

Correct answer & explanation hidden

Log in to view solution →
Q56 BIOLOGY Unit 5: Human Physiology
Receptor sites for neurotransmitters are present on
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Tips of axons
  • B. Post-synaptic membrane
  • C. Membranes of synaptic vesicles
  • D. Pre-synaptic membrane

Correct answer & explanation hidden

Log in to view solution →
Q57 BIOLOGY Unit 5: Human Physiology
GnRH, a hypothalamic hormone needed in reproduction, acts on
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Posterior pituitary gland and stimulates secretion of oxytocin and FSH
  • B. Posterior pituitary gland and stimulates secretion of LH and relaxin
  • C. Anterior pituitary gland and stimulates secretion of LH and oxytocin
  • D. Anterior pituitary gland and stimulates secretion of LH and FSH

Correct answer & explanation hidden

Log in to view solution →
Q58 BIOLOGY Unit 5: Human Physiology
Hypersecretion of Growth Hormone in adults does not cause further increase in height, because
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Bones lose their sensitivity to Growth Hormone in adults
  • B. Muscle fibres do not grow in size after birth
  • C. Growth Hormone becomes inactive in adults
  • D. Epiphyseal plates close after adolescence

Correct answer & explanation hidden

Log in to view solution →
Q59 BIOLOGY Unit 5: Human Physiology
Select the mismatch:
  • A. Anabaena – Nitrogen fixer
  • B. Rhizobium – Alfalfa
  • C. Frankia – Alnus
  • D. Rhodospirillum – Mycorrhiza

Correct answer & explanation hidden

Log in to view solution →
Q60 BIOLOGY Unit 10: Ecology and Environment
Which one of the following statements is not valid for aerosols?
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. They cause increased agricultural productivity
  • B. They have negative impact on agricultural land
  • C. They are harmful to human health
  • D. They alter rainfall and monsoon patterns

Correct answer & explanation hidden

Log in to view solution →
Q60 BIOLOGY Unit 10: Ecology and Environment
Which one of the following statements is not valid for aerosols?
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. They cause increased agricultural productivity
  • B. They have negative impact on agricultural land
  • C. They are harmful to human health
  • D. They alter rainfall and monsoon patterns

Correct answer & explanation hidden

Log in to view solution →
Q61 BIOLOGY Unit 10: Ecology and Environment
Which one of the following is related to ex-situ conservation of threatened animals and plants?
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. Amazon rainforest
  • B. Himalayan region
  • C. Wildlife safari parks
  • D. Biodiversity hot spots

Correct answer & explanation hidden

Log in to view solution →
Q61 BIOLOGY Unit 10: Ecology and Environment
Which one of the following is related to ex-situ conservation of threatened animals and plants?
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. Amazon rainforest
  • B. Himalayan region
  • C. Wildlife safari parks
  • D. Biodiversity hotspots

Correct answer & explanation hidden

Log in to view solution →
Q62 BIOLOGY Unit 4: Plant Physiology
Which of the following facilitates opening of stomatal aperture?
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Radial orientation of cellulose microfibrils in the cell wall of guard cells
  • B. Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells
  • C. Contraction of outer wall of guard cells
  • D. Decrease in turgidity of guard cells

Correct answer & explanation hidden

Log in to view solution →
Q63 BIOLOGY Unit 1: Diversity in Living World
Select the mismatch:
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Salvinia – Heterosporous
  • B. Equisetum – Homosporous
  • C. Pinus – Dioecious
  • D. Cycas – Dioecious

Correct answer & explanation hidden

Log in to view solution →
Q64 BIOLOGY Unit 10: Ecology and Environment
Asymptote in a logistic growth curve is obtained when
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. K > N
  • B. K < N
  • C. The value of r approaches zero
  • D. K = N

Correct answer & explanation hidden

Log in to view solution →
Q65 BIOLOGY Unit 6: Reproduction
The process of separation and purification of expressed protein before marketing is called
  • A. Bioprocessing
  • B. Postproduction processing
  • C. Upstream processing
  • D. Downstream processing

Correct answer & explanation hidden

Log in to view solution →
Q66 BIOLOGY Unit 4: Plant Physiology
The water potential of pure water is
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. More than zero but less than one
  • B. More than one
  • C. Zero
  • D. Less than zero

Correct answer & explanation hidden

Log in to view solution →
Q67 BIOLOGY Unit 6: Reproduction
The function of copper ions in copper-releasing IUDs is:
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. They make uterus unsuitable for implantation
  • B. They inhibit ovulation
  • C. They suppress sperm motility and fertilising capacity of sperms
  • D. They inhibit gametogenesis

Correct answer & explanation hidden

Log in to view solution →
Q68 BIOLOGY Unit 6: Reproduction
Double fertilization is exhibited by
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Fungi
  • B. Angiosperms
  • C. Gymnosperms
  • D. Algae

Correct answer & explanation hidden

Log in to view solution →
Q69 BIOLOGY Unit 10: Ecology and Environment
Presence of plants arranged into well-defined vertical layers depending on their height can be seen best in:
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Grassland
  • B. Temperate forest
  • C. Tropical savannah
  • D. Tropical rain forest

Correct answer & explanation hidden

Log in to view solution →
Q70 BIOLOGY Unit 10: Ecology and Environment
Which ecosystem has the maximum biomass?
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Pond ecosystem
  • B. Lake ecosystem
  • C. Forest ecosystem
  • D. Grassland ecosystem

Correct answer & explanation hidden

Log in to view solution →
Q71 BIOLOGY Unit 4: Plant Physiology
Root hairs develop from the region of
↻ Repeated question — also appeared in 2017 (1 set)
  • A. Root cap
  • B. Meristematic activity
  • C. Maturation
  • D. Elongation

Correct answer & explanation hidden

Log in to view solution →
Q72 BIOLOGY Unit 3: Cell Structure and Function
DNA replication in bacteria occurs
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. Prior to fission
  • B. Just before transcription
  • C. During S-phase
  • D. Within nucleolus

Correct answer & explanation hidden

Log in to view solution →
Q72 BIOLOGY Unit 3: Cell Structure and Function
DNA replication in bacteria occurs
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. Prior to fission
  • B. Just before transcription
  • C. During S-phase
  • D. Within nucleolus

Correct answer & explanation hidden

Log in to view solution →
Q73 BIOLOGY Unit 7: Genetics and Evolution
Homozygous purelines in cattle can be obtained by
  • A. Mating of individuals of different breed
  • B. Mating of individuals of different species
  • C. Mating of related individuals of same breed
  • D. Mating of unrelated individuals of same breed

Correct answer & explanation hidden

Log in to view solution →
Q73 BIOLOGY Unit 5: Human Physiology
Homozygous purelines in cattle can be obtained by
  • A. Mating of individuals of different breed
  • B. Mating of individuals of different species
  • C. Mating of related individuals of same breed
  • D. Mating of unrelated individuals of same breed

Correct answer & explanation hidden

Log in to view solution →
Q74 BIOLOGY Unit 2: Structural Organisation in Animals and Plants
In Bougainvillea, thorns are modifications of
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. Stem
  • B. Leaf
  • C. Stipules
  • D. Adventitious root

Correct answer & explanation hidden

Log in to view solution →
Q74 BIOLOGY Unit 2: Structural Organisation in Animals and Plants
In Bougainvillea, thorns are the modifications of
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. Stem
  • B. Leaf
  • C. Stipules
  • D. Adventitious root

Correct answer & explanation hidden

Log in to view solution →
Q75 BIOLOGY Unit 5: Human Physiology
A decrease in blood pressure/volume will not cause the release of
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Aldosterone
  • B. ADH
  • C. Renin
  • D. Atrial Natriuretic Factor

Correct answer & explanation hidden

Log in to view solution →
Q76 BIOLOGY Unit 5: Human Physiology
Which statement is wrong for Krebs' cycle?
  • A. During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesised
  • B. The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid
  • C. There are three points in the cycle where NAD+ is reduced to NADH + H+
  • D. There is one point in the cycle where FAD+ is reduced to FADH2

Correct answer & explanation hidden

Log in to view solution →
Q77 BIOLOGY Unit 3: Cell Structure and Function
Anaphase promoting complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur?
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Chromosomes will not segregate
  • B. Recombination of chromosome arms will occur
  • C. Chromosomes will not condense
  • D. Chromosomes will be fragmented

Correct answer & explanation hidden

Log in to view solution →
Q78 BIOLOGY Unit 5: Human Physiology
Which of the following options best represents the enzyme composition of pancreatic juice?
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Peptidase, amylase, pepsin, rennin
  • B. Lipase, amylase, trypsinogen, procarboxypeptidase
  • C. Amylase, peptidase, trypsinogen, rennin
  • D. Amylase, pepsin, trypsinogen, maltase

Correct answer & explanation hidden

Log in to view solution →
Q79 BIOLOGY Unit 1: Diversity in Living World
Life cycle of Ectocarpus and Fucus respectively are
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Haplodiplontic, Diplontic
  • B. Haplodiplontic, Haplontic
  • C. Haplontic, Diplontic
  • D. Diplontic, Haplodiplontic

Correct answer & explanation hidden

Log in to view solution →
Q80 BIOLOGY Unit 2: Structural Organisation in Animals and Plants
Which of the following is made up of dead cells?
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Phellem
  • B. Phloem
  • C. Xylem parenchyma
  • D. Collenchyma

Correct answer & explanation hidden

Log in to view solution →
Q81 BIOLOGY Unit 10: Ecology and Environment
Which of the following is correctly matched for the product produced by them?
  • A. Penicillium notatum : Acetic acid
  • B. Saccharomyces cerevisiae : Ethanol
  • C. Acetobacter aceti : Antibiotics
  • D. Methanobacterium : Lactic acid

Correct answer & explanation hidden

Log in to view solution →
Q82 BIOLOGY Unit 4: Plant Physiology
Fruit and leaf drop at early stages can be prevented by the application of
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Auxins
  • B. Gibberellic acid
  • C. Cytokinins
  • D. Ethylene

Correct answer & explanation hidden

Log in to view solution →
Q82 BIOLOGY Unit 9: Biotechnology and Its Applications
Fruit and leaf drop at early stages can be prevented by the application of
  • A. Auxins
  • B. Gibberellic acid
  • C. Cytokinins
  • D. Ethylene

Correct answer & explanation hidden

Log in to view solution →
Q83 BIOLOGY Unit 10: Ecology and Environment
Viroids differ from viruses in having :
  • A. RNA molecules with protein coat
  • B. RNA molecules without protein coat
  • C. DNA molecules with protein coat
  • D. DNA molecules without protein coat

Correct answer & explanation hidden

Log in to view solution →
Q83 BIOLOGY Unit 1: Diversity in Living World
Viroids differ from viruses in having:
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. RNA molecules with protein coat
  • B. RNA molecules without protein coat
  • C. DNA molecules with protein coat
  • D. DNA molecules without protein coat

Correct answer & explanation hidden

Log in to view solution →
Q84 PHYSICS Unit 4: Work Energy and Power
Which of the following are not polymeric?
  • A. Polysaccharides
  • B. Lipids
  • C. Nucleic acids
  • D. Proteins

Correct answer & explanation hidden

Log in to view solution →
Q84 BIOLOGY Unit 10: Ecology and Environment
Which of the following are not polymeric?
  • A. Polysaccharides
  • B. Lipids
  • C. Nucleic acids
  • D. Proteins

Correct answer & explanation hidden

Log in to view solution →
Q85 BIOLOGY Unit 5: Human Physiology
A temporary endocrine gland in the human body is
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Corpus luteum
  • B. Corpus allatum
  • C. Pineal gland
  • D. Corpus cardiacum

Correct answer & explanation hidden

Log in to view solution →
Q86 BIOLOGY Unit 4: Plant Physiology
Phosphoenol pyruvate (PEP) is the primary CO2 acceptor in:
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. C2 plants
  • B. C3 and C4 plants
  • C. C3 plants
  • D. C4 plants

Correct answer & explanation hidden

Log in to view solution →
Q87 BIOLOGY Unit 4: Plant Physiology
Plants which produce characteristic pneumatophores and show vivipary belong to
  • A. Psammophytes
  • B. Hydrophytes
  • C. Mesophytes
  • D. Halophytes

Correct answer & explanation hidden

Log in to view solution →
Q88 BIOLOGY Unit 1: Diversity in Living World
Mycorrhizae are an example of
↻ Repeated question — also appeared in 2017 (1 set)
  • A. Antibiosis
  • B. Mutualism
  • C. Fungistasis
  • D. Amensalism

Correct answer & explanation hidden

Log in to view solution →
Q89 BIOLOGY Unit 7: Genetics and Evolution
If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered?
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. 33
  • B. 333
  • C. 1
  • D. 11

Correct answer & explanation hidden

Log in to view solution →
Q90 PHYSICS Unit 3: Laws of Motion
A gene whose expression helps to identify transformed cell is known as
  • A. Plasmid
  • B. Structural gene
  • C. Selectable marker
  • D. Vector

Correct answer & explanation hidden

Log in to view solution →
Q91 BIOLOGY Unit 1: Diversity in Living World
Which of the following are found in extreme saline conditions?
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Cyanobacteria
  • B. Mycobacteria
  • C. Archaebacteria
  • D. Eubacteria

Correct answer & explanation hidden

Log in to view solution →
Q92 BIOLOGY Unit 2: Structural Organisation in Animals and Plants
Out of 'X' pairs of ribs in humans only 'Y' pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation:
  • A. X = 24, Y = 7 True ribs are dorsally attached to vertebral column but are free on ventral side
  • B. X = 24, Y = 12 True ribs are dorsally attached to vertebral column but are free on ventral side
  • C. X = 12, Y = 7 True ribs are attached dorsally to vertebral column and ventrally to the sternum
  • D. X = 12, Y = 5 True ribs are attached dorsally to vertebral column and sternum on the two ends

Correct answer & explanation hidden

Log in to view solution →
Q93 BIOLOGY Unit 5: Human Physiology
MALT constitutes about ______ percent of the lymphoid tissue in human body
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. 70%
  • B. 10%
  • C. 50%
  • D. 20%

Correct answer & explanation hidden

Log in to view solution →
Q93 BIOLOGY Unit 5: Human Physiology
MALT constitutes about ________ percent of the lymphoid tissue in the human body.
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. 70%
  • B. 10%
  • C. 50%
  • D. 20%

Correct answer & explanation hidden

Log in to view solution →
Q94 BIOLOGY Unit 7: Genetics and Evolution
Which one from those given below is the period for Mendel's hybridization experiments?
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. 1857 - 1869
  • B. 1870 - 1877
  • C. 1856 - 1863
  • D. 1840 - 1850

Correct answer & explanation hidden

Log in to view solution →
Q94 BIOLOGY Unit 7: Genetics and Evolution
Which one of the following is the period of Mendel's hybridization experiments?
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. 1857 - 1869
  • B. 1870 - 1877
  • C. 1856 - 1863
  • D. 1840 - 1850

Correct answer & explanation hidden

Log in to view solution →
Q95 BIOLOGY Unit 3: Cell Structure and Function
Adult human RBCs are enucleate. Which of the following statement(s) is/are the most appropriate explanation for this feature?
↻ Repeated question — also appeared in 2017 (1 set)
  • A. (a), (c) and (d)
  • B. (b) and (c)
  • C. Only (d)
  • D. Only (a)

Correct answer & explanation hidden

Log in to view solution →
Q95 BIOLOGY Unit 5: Human Physiology
Adult human RBCs are enucleate. Which of the following statement(s) is/are the most appropriate explanation for this feature? (a) They do not need to reproduce (b) They are somatic cells (c) They do not metabolize (d) All their internal space is available for oxygen transport
↻ Repeated question — also appeared in 2017 (1 set)
  • A. (a), (c) and (d)
  • B. (b) and (c)
  • C. Only (d)
  • D. Only (a)

Correct answer & explanation hidden

Log in to view solution →
Q96 BIOLOGY Unit 5: Human Physiology
Myelin sheath is produced by
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Oligodendrocytes and osteoclasts
  • B. Osteoclasts and astrocytes
  • C. Schwann cells and oligodendrocytes
  • D. Astrocytes and Schwann cells

Correct answer & explanation hidden

Log in to view solution →
Q97 BIOLOGY Unit 5: Human Physiology
Which of the following statements is correct?
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. The ascending limb of loop of Henle is permeable to water
  • B. The descending limb of loop of Henle is permeable to electrolytes
  • C. The ascending limb of loop of Henle is impermeable to water
  • D. The descending limb of loop of Henle is impermeable to water

Correct answer & explanation hidden

Log in to view solution →
Q98 BIOLOGY Unit 3: Cell Structure and Function
During DNA replication, Okazaki fragments are used to elongate
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. the leading strand away from the replication fork
  • B. the lagging strand away from the replication fork
  • C. the leading strand towards the replication fork
  • D. the lagging strand towards the replication fork

Correct answer & explanation hidden

Log in to view solution →
Q99 BIOLOGY Unit 3: Cell Structure and Function
Which one of the following statements is correct, with reference to enzymes?
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Coenzyme = Apoenzyme + Holoenzyme
  • B. Holoenzyme = Coenzyme + Cofactor
  • C. Apoenzyme = Holoenzyme + Coenzyme
  • D. Holoenzyme = Apoenzyme + Coenzyme

Correct answer & explanation hidden

Log in to view solution →
Q100 BIOLOGY Unit 3: Cell Structure and Function
DNA fragments are
↻ Repeated question — also appeared in 2017 (1 set)
  • A. Neutral
  • B. Either positively or negatively charged depending on their size
  • C. Positively charged
  • D. Negatively charged

Correct answer & explanation hidden

Log in to view solution →
Q101 CHEMISTRY Unit 20: Principles Related to Practical Chemistry
The DNA fragments separated on an agarose gel can be visualised after staining with
  • A. Aniline blue
  • B. Ethidium bromide
  • C. Bromophenol blue
  • D. Acetocarmine

Correct answer & explanation hidden

Log in to view solution →
Q102 BIOLOGY Unit 1: Diversity in Living World
Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. Mycoplasma
  • B. Nostoc
  • C. Bacillus
  • D. Pseudomonas

Correct answer & explanation hidden

Log in to view solution →
Q102 BIOLOGY Unit 1: Diversity in Living World
Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. Mycoplasma
  • B. Nostoc
  • C. Bacillus
  • D. Pseudomonas

Correct answer & explanation hidden

Log in to view solution →
Q103 BIOLOGY Unit 1: Diversity in Living World
The morphological nature of the edible part of coconut is
↻ Repeated question — also appeared in 2017 (1 set)
  • A. Endosperm
  • B. Pericarp
  • C. Perisperm
  • D. Cotyledon

Correct answer & explanation hidden

Log in to view solution →
Q104 BIOLOGY Unit 5: Human Physiology
Select the correct route for the passage of sperms in male frogs:
↻ Repeated question — also appeared in 2017 (1 set)
  • A. Testes → Vasa efferentia → Bidder's canal → Ureter → Cloaca
  • B. Testes → Vasa efferentia → Kidney → Bidder's canal → Urinogenital duct → Cloaca
  • C. Testes → Bidder's canal → Kidney → Vasa efferentia → Urinogenital duct → Cloaca
  • D. Testes → Vasa efferentia → Kidney → Seminal vesicle → Urinogenital duct → Cloaca

Correct answer & explanation hidden

Log in to view solution →
Q136 CHEMISTRY Unit 14: Some Basic Principles of Organic Chemistry
An example of a sigma-bonded organometallic compound is
  • A. Ferrocene
  • B. Cobaltocene
  • C. Ruthenocene
  • D. Grignard's reagent

Correct answer & explanation hidden

Log in to view solution →
Q137 CHEMISTRY Unit 14: Some Basic Principles of Organic Chemistry
Which one is the correct order of acidity?
  • A. CH≡CH > CH2=CH2 > CH3–C≡CH > CH3–CH3
  • B. CH3–CH3 > CH2=CH2 > CH3–C≡CH > CH≡CH
  • C. CH2=CH2 > CH3–CH=CH2 > CH3–C≡CH > CH≡CH
  • D. CH≡CH > CH3–C≡CH > CH2=CH2 > CH3–CH3

Correct answer & explanation hidden

Log in to view solution →
Q138 CHEMISTRY Unit 17: Organic Compounds Containing Oxygen
Predict the correct intermediate and product in the following reaction: CH3C≡CH + H2O, H2SO4 / HgSO4 → intermediate product
  • A. A: CH3COCH3 ; B: CH3C≡CH
  • B. A: CH3CH2OH ; B: CH3COCH3
  • C. A: CH3CH2SO4H ; B: CH3COCH3
  • D. A: CH3CH2OH ; B: CH3CH2SO4H

Correct answer & explanation hidden

Log in to view solution →
Q139 CHEMISTRY Unit 10: p-Block Elements
It is because of inability of ns^2 electrons of the valence shell to participate in bonding that
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Sn2+ and Pb2+ are both oxidising and reducing
  • B. Sn4+ is reducing while Pb4+ is oxidising
  • C. Sn2+ is reducing while Pb4+ is oxidising
  • D. Sn2+ is oxidising while Pb4+ is reducing

Correct answer & explanation hidden

Log in to view solution →
Q140 CHEMISTRY Unit 7: Redox Reactions and Electrochemistry
Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts is put under an electric field?
↻ Repeated question — also appeared in 2017 (1 set)
  • A. Rb
  • B. Li
  • C. Na
  • D. K

Correct answer & explanation hidden

Log in to view solution →
Q141 CHEMISTRY Unit 10: p-Block Elements
Match the interhalogen compounds of column I with the geometry in column II and assign the correct code. Column I: (a) XX', (b) XX'3, (c) XX'5, (d) XX'7 Column II: (i) T-shape, (ii) Pentagonal bipyramidal, (iii) Linear, (iv) Square-pyramidal, (v) Tetrahedral
↻ Repeated question — also appeared in 2017 (1 set)
  • A. (v) (iv) (iii) (ii)
  • B. (iv) (iii) (ii) (i)
  • C. (iii) (iv) (i) (ii)
  • D. (iii) (i) (iv) (ii)

Correct answer & explanation hidden

Log in to view solution →
Q141 CHEMISTRY Unit 12: Coordination Compounds
Match the interhalogen compounds of Column I with the geometry in Column II and assign the correct code.
  • A. (a) XX′, (b) XX′3, (c) XX′5, (d) XX′7
  • B. (a) XX′, (b) XX′3, (c) XX′5, (d) XX′7
  • C. (a) XX′, (b) XX′3, (c) XX′5, (d) XX′7
  • D. (a) XX′, (b) XX′3, (c) XX′5, (d) XX′7

Correct answer & explanation hidden

Log in to view solution →
Q142 CHEMISTRY Unit 13: Purification and Characterisation of Organic Compounds
Which of the following statements is incorrect?
  • A. NaCl(s) is an insulator, silicon is a semiconductor, silver is a conductor, quartz is a piezoelectric crystal
  • B. Frenkel defect is favoured in those ionic compounds in which sizes of cation and anion are almost equal
  • C. FeO0.98 has non-stoichiometric metal deficiency defect
  • D. Density decreases in case of crystals with Schottky's defect

Correct answer & explanation hidden

Log in to view solution →
Q143 CHEMISTRY Unit 6: Equilibrium
Which one of the following statements is not correct?
↻ Repeated question — also appeared in 2017 (1 set)
  • A. Enzymes catalyse mainly biochemical reactions
  • B. Coenzymes increase the catalytic activity of enzyme
  • C. Catalyst does not initiate any reaction
  • D. The value of equilibrium constant is changed in the presence of a catalyst in the reaction at equilibrium

Correct answer & explanation hidden

Log in to view solution →
Q144 CHEMISTRY Unit 7: Redox Reactions and Electrochemistry
In the electrochemical cell Zn|ZnSO4 (0.01 M)||CuSO4 (1.0 M)|Cu, the emf of this Daniell cell is E1. When the concentration of ZnSO4 is changed to 1.0 M and that of CuSO4 is changed to 0.01 M, the emf changes to E2. From the following, which one is the relationship between E1 and E2? Given RT/F = 0.059.
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. E1 > E2
  • B. E2 = 0 ≠ E1
  • C. E1 = E2
  • D. E1 < E2

Correct answer & explanation hidden

Log in to view solution →
Q145 CHEMISTRY Unit 14: Some Basic Principles of Organic Chemistry
The correct statement regarding electrophile is:
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile
  • B. Electrophile can be either neutral or positively charged species and can form a bond by accepting a pair of electrons from a nucleophile
  • C. Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a nucleophile
  • D. Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from another electrophile

Correct answer & explanation hidden

Log in to view solution →
Q146 CHEMISTRY Unit 12: Coordination Compounds
The correct order of the stoichiometries of AgCl formed when AgNO3 in excess is treated with the complexes CoCl3·6NH3, CoCl3·5NH3, and CoCl3·4NH3 respectively is:
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. 3 AgCl, 2 AgCl, 1 AgCl
  • B. 2 AgCl, 3 AgCl, 1 AgCl
  • C. 1 AgCl, 3 AgCl, 2 AgCl
  • D. 3 AgCl, 1 AgCl, 2 AgCl

Correct answer & explanation hidden

Log in to view solution →
Q147 CHEMISTRY Unit 14: Some Basic Principles of Organic Chemistry
The IUPAC name of the compound is:
  • A. 5-methyl-4-oxohex-2-en-5-al
  • B. 3-keto-2-methylhex-5-enal
  • C. 3-keto-2-methylhex-4-enal
  • D. 5-formylhex-2-en-3-one

Correct answer & explanation hidden

Log in to view solution →
Q148 CHEMISTRY Unit 3: Chemical Bonding and Molecular Structure
The species having bond angle of 120° is:
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. NCl3
  • B. BCl3
  • C. PH3
  • D. ClF3

Correct answer & explanation hidden

Log in to view solution →
Q148 CHEMISTRY Unit 3: Chemical Bonding and Molecular Structure
The species having bond angle of 120° is
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. NCl3
  • B. BCl3
  • C. PH3
  • D. ClF3

Correct answer & explanation hidden

Log in to view solution →
Q149 CHEMISTRY Unit 6: Equilibrium
The equilibrium constants of the following are: N2 + 3H2 ⇌ 2NH3, K1; N2 + O2 ⇌ 2NO, K2; 2H2 + O2 ⇌ 2H2O, K3. The equilibrium constant K of the reaction 2NH3 + 5/2 O2 ⇌ 2NO + 3H2O will be:
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. K2K3/K1
  • B. K3/(K2^3 K1)
  • C. K3/(K1 K2^3)
  • D. K2K3/(K1^3)

Correct answer & explanation hidden

Log in to view solution →
Q150 CHEMISTRY Unit 10: p-Block Elements
Name the gas that can readily decolourise acidified KMnO4 solution:
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. NO2
  • B. P2O5
  • C. CO2
  • D. SO2

Correct answer & explanation hidden

Log in to view solution →
Q150 CHEMISTRY Unit 7: Redox Reactions and Electrochemistry
Name the gas that can readily decolourise acidified KMnO4 solution:
  • A. NO2
  • B. P2O5
  • C. CO2
  • D. SO2

Correct answer & explanation hidden

Log in to view solution →
Q151 CHEMISTRY Unit 17: Organic Compounds Containing Oxygen
The most suitable method of separation of a 1:1 mixture of ortho- and para-nitrophenols is:
↻ Repeated question — also appeared in 2017 (1 set)
  • A. Crystallisation
  • B. Steam distillation
  • C. Sublimation
  • D. Chromatography

Correct answer & explanation hidden

Log in to view solution →
Q152 CHEMISTRY Unit 11: d- and f-Block Elements
The reason for greater range of oxidation states in actinoids is attributed to
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. 5f, 6d and 7s levels having comparable energies
  • B. 4f and 5d levels being close in energies
  • C. The radioactive nature of actinoids
  • D. Actinoid contraction

Correct answer & explanation hidden

Log in to view solution →
Q153 CHEMISTRY Unit 9: Classification of Elements and Periodicity in Properties
The element Z = 114 has been discovered recently. It will belong to which of the following family group and electronic configuration?
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Oxygen family, [Rn] 5f14 6d10 7s2 7p4
  • B. Nitrogen family, [Rn] 5f14 6d10 7s2 7p6
  • C. Halogen family, [Rn] 5f14 6d10 7s2 7p5
  • D. Carbon family, [Rn] 5f14 6d10 7s2 7p2

Correct answer & explanation hidden

Log in to view solution →
Q154 CHEMISTRY Unit 8: Chemical Kinetics
Mechanism of a hypothetical reaction X2 + Y2 → 2XY is given below: (i) X2 → X + X (fast) (ii) X + Y2 → XY + Y (slow) (iii) X + Y → XY (fast) The overall order of the reaction will be
↻ Repeated question — also appeared in 2017 (2 sets)
  • B. 1.5
  • C. 1
  • D. 2

Correct answer & explanation hidden

Log in to view solution →
Q155 CHEMISTRY Unit 5: Solutions
If molality of a dilute solution is doubled, the value of molal depression constant (Kf) will be
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Tripled
  • B. Unchanged
  • C. Doubled
  • D. Halved

Correct answer & explanation hidden

Log in to view solution →
Q156 CHEMISTRY Unit 14: Some Basic Principles of Organic Chemistry
With respect to the conformers of ethane, which of the following statements is true?
↻ Repeated question — also appeared in 2017 (1 set)
  • A. Both bond angle and bond length change
  • B. Both bond angles and bond length remain same
  • C. Bond angle remains same but bond length changes
  • D. Bond angle changes but bond length remains same

Correct answer & explanation hidden

Log in to view solution →
Q157 CHEMISTRY Unit 17: Organic Compounds Containing Oxygen
The heating of phenyl methyl ether with HI produces
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Phenol
  • B. Benzene
  • C. Ethyl chlorides
  • D. Iodobenzene

Correct answer & explanation hidden

Log in to view solution →
Q158 CHEMISTRY Unit 14: Some Basic Principles of Organic Chemistry
The correct increasing order of basic strength for the following compounds is: (I) p-nitroaniline (II) aniline (III) p-toluidine
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. III < II < I
  • B. II < I < III
  • C. II < III < I
  • D. III < I < II

Correct answer & explanation hidden

Log in to view solution →
Q159 CHEMISTRY Unit 10: p-Block Elements
In which pair of ions do both the species contain S-S bond?
↻ Repeated question — also appeared in 2017 (1 set)
  • A. S2O7^2−, S2O8^2−
  • B. S4O6^2−, S2O7^2−
  • C. S2O7^2−, S2O3^2−
  • D. S4O6^2−, S2O3^2−

Correct answer & explanation hidden

Log in to view solution →
Q159 CHEMISTRY Unit 12: Coordination Compounds
In which pair of ions do both species contain an S–S bond?
  • A. S2O7^2−, S2O8^2−
  • B. S4O6^2−, S2O7^2−
  • C. S2O7^2−, S2O3^2−
  • D. S4O6^2−, S2O3^2−

Correct answer & explanation hidden

Log in to view solution →
Q160 CHEMISTRY Unit 5: Solutions
Which of the following is dependent on temperature?
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. Mole fraction
  • B. Weight percentage
  • C. Molality
  • D. Molarity

Correct answer & explanation hidden

Log in to view solution →
Q160 CHEMISTRY Unit 5: Solutions
Which of the following is dependent on temperature?
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. Mole fraction
  • B. Weight percentage
  • C. Molality
  • D. Molarity

Correct answer & explanation hidden

Log in to view solution →
Q161 CHEMISTRY Unit 17: Organic Compounds Containing Oxygen
Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Option 1 structure
  • B. Option 2 structure
  • C. Option 3 structure
  • D. Option 4 structure

Correct answer & explanation hidden

Log in to view solution →
Q161 CHEMISTRY Unit 17: Organic Compounds Containing Oxygen
Which of the following is the product formed when cyclohexanone undergoes aldol condensation followed by heating?
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Cyclohexanol-derived aldol product with an OH group retained
  • B. A diketone product
  • C. An unsaturated alcohol product
  • D. Cyclohexylidene cyclohexanone (α,β-unsaturated ketone)

Correct answer & explanation hidden

Log in to view solution →
Q162 CHEMISTRY Unit 20: Principles Related to Practical Chemistry
Mixture of chloroxylenol and terpineol acts as
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Antipyretic
  • B. Antibiotic
  • C. Analgesic
  • D. Antiseptic

Correct answer & explanation hidden

Log in to view solution →
Q162 CHEMISTRY Unit 20: Principles Related to Practical Chemistry
Mixture of chloroxylenol and terpineol acts as
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Antipyretic
  • B. Antibiotic
  • C. Analgesic
  • D. Antiseptic

Correct answer & explanation hidden

Log in to view solution →
Q163 CHEMISTRY Unit 4: Chemical Thermodynamics
For a given reaction, ΔH = 35.5 kJ mol−1 and ΔS = 83.6 J K−1 mol−1. The reaction is spontaneous at: (Assume that ΔH and ΔS do not vary with temperature)
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. All temperatures
  • B. T > 298 K
  • C. T < 425 K
  • D. T > 425 K

Correct answer & explanation hidden

Log in to view solution →
Q163 CHEMISTRY Unit 4: Chemical Thermodynamics
For a given reaction, ΔH = 35.5 kJ mol−1 and ΔS = 83.6 J K−1 mol−1. The reaction is spontaneous at: (Assume that ΔH and ΔS do not vary with temperature)
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. All temperatures
  • B. T > 298 K
  • C. T < 425 K
  • D. T > 425 K

Correct answer & explanation hidden

Log in to view solution →
Q164 CHEMISTRY Unit 12: Coordination Compounds
HgCl2 and I2 both when dissolved in water containing I− ions, the pair of species formed is
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. [HgI4]2−, I3−
  • B. Hg2I2, I−
  • C. HgI3−, I−
  • D. HgI2, I−

Correct answer & explanation hidden

Log in to view solution →
Q165 CHEMISTRY Unit 8: Chemical Kinetics
A first order reaction has a specific reaction rate of 10−2 s−1. How much time will it take for 20 g of the reactant to reduce to 5 g?
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. 346.5 second
  • B. 693.0 second
  • C. 238.6 second
  • D. 138.6 second

Correct answer & explanation hidden

Log in to view solution →
Q166 CHEMISTRY Unit 17: Organic Compounds Containing Oxygen
Which one is the most acidic compound?
  • A. Phenol with one nitro group
  • B. Phenol with two nitro groups
  • C. Cresol (phenol with CH3 group)
  • D. Phenol

Correct answer & explanation hidden

Log in to view solution →
Q167 CHEMISTRY Unit 12: Coordination Compounds
Correct increasing order for the wavelengths of absorption in the visible region for the complexes of Co3+ is
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. [Co(H2O)6]3+, [Co(NH3)6]3+, [Co(en)3]3+
  • B. [Co(NH3)6]3+, [Co(en)3]3+, [Co(H2O)6]3+
  • C. [Co(en)3]3+, [Co(NH3)6]3+, [Co(H2O)6]3+
  • D. [Co(H2O)6]3+, [Co(en)3]3+, [Co(NH3)6]3+

Correct answer & explanation hidden

Log in to view solution →
Q168 CHEMISTRY Unit 6: Equilibrium
Concentration of the Ag+ ions in a saturated solution of Ag2C2O4 is 2.2 × 10−4 mol L−1. Solubility product of Ag2C2O4 is
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. 4.5 × 10−11
  • B. 5.3 × 10−12
  • C. 2.42 × 10−8
  • D. 2.66 × 10−12

Correct answer & explanation hidden

Log in to view solution →
Q169 CHEMISTRY Unit 6: Equilibrium
A 20 litre container at 400 K contains CO2(g) at pressure 0.4 atm and an excess of SrO (neglect the volume of solid SrO). The volume of the container is now decreased by moving the movable piston fitted in the container. The maximum volume of the container, when pressure of CO2 attains its maximum value, will be: Given that SrCO3(s) ⇌ SrO(s) + CO2(g), Kp = 1.6 atm
↻ Repeated question — also appeared in 2017 (1 set)
  • A. 4 litre
  • B. 2 litre
  • C. 5 litre
  • D. 10 litre

Correct answer & explanation hidden

Log in to view solution →
Q170 CHEMISTRY Unit 16: Organic Compounds Containing Halogens
Identify A and predict the type of reaction: OCH3-substituted bromobenzene reacts with NaNH2 to give A.
  • A. Unchanged bromomethoxybenzene; cine substitution reaction
  • B. Methoxybenzene; cine substitution reaction
  • C. Methoxyaniline; substitution reaction
  • D. Methoxyaniline; elimination-addition reaction

Correct answer & explanation hidden

Log in to view solution →
Q170 CHEMISTRY Unit 18: Organic Compounds Containing Nitrogen
Identify A and predict the type of reaction. OCH3 Br NaNH2 A
  • A. OCH3 and cine substitution reaction
  • B. OCH3 and cine substitution reaction
  • C. OCH3NH2 and substitution reaction
  • D. OCH3NH2 and elimination addition reaction

Correct answer & explanation hidden

Log in to view solution →
Q171 CHEMISTRY Unit 18: Organic Compounds Containing Nitrogen
Which of the following reactions is appropriate for converting acetamide to methanamine?
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Stephens reaction
  • B. Gabriel's phthalimide synthesis
  • C. Carbylamine reaction
  • D. Hoffmann hypobromamide reaction

Correct answer & explanation hidden

Log in to view solution →
Q172 CHEMISTRY Unit 3: Chemical Bonding and Molecular Structure
Which of the following pairs of compounds is isoelectronic and isostructural?
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. IBr2−, XeF2
  • B. IF3, XeF2
  • C. BeCl2, XeF2
  • D. TeI2, XeF2

Correct answer & explanation hidden

Log in to view solution →
Q174 CHEMISTRY Unit 3: Chemical Bonding and Molecular Structure
Which one of the following pairs of species have the same bond order?
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. CN−, CO
  • B. N2, O2−
  • C. CO, NO
  • D. O2, NO+

Correct answer & explanation hidden

Log in to view solution →
Q175 CHEMISTRY Unit 4: Chemical Thermodynamics
A gas is allowed to expand in a well insulated container against a constant external pressure of 2.5 atm from an initial volume of 2.50 L to a final volume of 4.50 L. The change in internal energy ΔU of the gas in joules will be
↻ Repeated question — also appeared in 2017 (1 set)
  • A. −505 J
  • B. +505 J
  • C. 1136.25 J
  • D. −500 J

Correct answer & explanation hidden

Log in to view solution →
Q176 CHEMISTRY Unit 11: d- and f-Block Elements
Extraction of gold and silver involves leaching with CN− ion. Silver is later recovered by
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Zone refining
  • B. Displacement with Zn
  • C. Liquation
  • D. Distillation

Correct answer & explanation hidden

Log in to view solution →
Q177 CHEMISTRY Unit 14: Some Basic Principles of Organic Chemistry
Consider the reactions: X → A (A is C2H6O) Cu / 573 K [Ag(NH3)2]+, OH−, Δ OH−, Δ Y O NH2−NH−C−NH2 Z Silver mirror observed Identify A, X, Y and Z.
  • A. A-Ethanal, X-Ethanol, Y-But-2-enal, Z-Semicarbazone
  • B. A-Ethanol, X-Acetaldehyde, Y-Butanone, Z-Hydrazone
  • C. A-Methoxymethane, X-Ethanoic acid, Y-Acetate ion, Z-Hydrazine
  • D. A-Methoxymethane, X-Ethanol, Y-Ethanoic acid, Z-Semicarbazide

Correct answer & explanation hidden

Log in to view solution →
Q178 CHEMISTRY Unit 12: Coordination Compounds
Pick out the correct statement with respect to [Mn(CN)6]3− :
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. It is d2sp3 hybridised and octahedral
  • B. It is dsp2 hybridised and square planar
  • C. It is sp3d2 hybridised and octahedral
  • D. It is sp3d2 hybridised and tetrahedral

Correct answer & explanation hidden

Log in to view solution →
Q178 CHEMISTRY Unit 12: Coordination Compounds
Pick out the correct statement with respect to [Mn(CN)6]3−:
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. It is d2sp3 hybridised and octahedral
  • B. It is dsp2 hybridised and square planar
  • C. It is sp3d2 hybridised and octahedral
  • D. It is sp3d2 hybridised and tetrahedral

Correct answer & explanation hidden

Log in to view solution →
Q179 CHEMISTRY Unit 2: Atomic Structure
Which one is the wrong statement?
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. Half-filled and fully filled orbitals have greater stability due to greater exchange energy, greater symmetry and more balanced arrangement
  • B. The energy of 2s orbital is less than the energy of 2p orbital in case of hydrogen-like atoms
  • C. de-Broglie's wavelength is given by λ = h/mv, where m = mass of the particle, v = group velocity of the particle
  • D. The uncertainty principle is ΔE × Δt ≥ h/4π

Correct answer & explanation hidden

Log in to view solution →
Q179 CHEMISTRY Unit 2: Atomic Structure
Which one is the wrong statement?
↻ Repeated question — also appeared in 2017 (3 sets)
  • A. Half-filled and fully filled orbitals have greater stability due to greater exchange energy, greater symmetry and more balanced arrangement
  • B. The energy of 2s orbital is less than the energy of 2p orbital in case of hydrogen-like atoms
  • C. de-Broglie's wavelength is given by λ = h/mv, where m = mass of the particle and v = group velocity of the particle
  • D. The uncertainty principle is ΔE × Δt ≥ h/4π

Correct answer & explanation hidden

Log in to view solution →
Q180 CHEMISTRY Unit 19: Biomolecules
Which of the following statements is not correct?
↻ Repeated question — also appeared in 2017 (2 sets)
  • A. Blood proteins thrombin and fibrinogen are involved in blood clotting
  • B. Denaturation makes the proteins more active
  • C. Insulin maintains sugar level in the blood of a human body
  • D. Ovalbumin is a simple food reserve in egg-white

Correct answer & explanation hidden

Log in to view solution →